
package labox.innovation.gameserver.script.faenor;

import java.io.File;
import java.io.FileFilter;
import java.io.IOException;
import java.util.LinkedList;
import java.util.List;
import java.util.zip.ZipException;
import java.util.zip.ZipFile;

import javax.script.ScriptContext;

import labox.innovation.config.Config;
import labox.innovation.gameserver.script.Parser;
import labox.innovation.gameserver.script.ParserNotCreatedException;
import labox.innovation.gameserver.script.ScriptDocument;
import labox.innovation.gameserver.script.ScriptEngine;
import labox.innovation.gameserver.script.ScriptPackage;
import labox.innovation.gameserver.scripting.L2ScriptEngineManager;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.w3c.dom.Node;

/**
 * @author Luis Arias
 *
 */
public class FaenorScriptEngine extends ScriptEngine {
	static Logger _log = LoggerFactory.getLogger(FaenorScriptEngine.class.getName());

	public final static String PACKAGE_DIRECTORY = "data/faenor/";

	public final static boolean DEBUG = true;

	private LinkedList<ScriptDocument> _scripts;

	public static FaenorScriptEngine getInstance() {
		return SingletonHolder._instance;
	}

	private FaenorScriptEngine() {
		_scripts = new LinkedList<ScriptDocument>();
		loadPackages();
		parsePackages();

	}

	public void reloadPackages() {
		_scripts = new LinkedList<ScriptDocument>();
		parsePackages();
	}

	private void loadPackages() {
		File packDirectory = new File(Config.DATAPACK_ROOT, PACKAGE_DIRECTORY);//_log.sss(packDirectory.getAbsolutePath());

		FileFilter fileFilter = new FileFilter() {
			public boolean accept(File file) {
				return file.getName().endsWith(".zip");
			}
		};

		File[] files = packDirectory.listFiles(fileFilter);
		if (files == null)
			return;
		ZipFile zipPack;

		for (File file : files) {
			try {
				zipPack = new ZipFile(file);
			} catch (ZipException e) {
				e.printStackTrace();
				continue;
			} catch (IOException e) {
				e.printStackTrace();
				continue;
			}

			ScriptPackage module = new ScriptPackage(zipPack);

			List<ScriptDocument> scrpts = module.getScriptFiles();
			for (ScriptDocument script : scrpts) {
				_scripts.add(script);
			}
			try {
				zipPack.close();
			} catch (IOException e) {
			}
		}
		/*for (ScriptDocument script : scripts)
		 {
		 _log.sss("Script: "+script);
		 }
		 _log.sss("Sorting");
		 orderScripts();
		 for (ScriptDocument script : scripts)
		 {
		 _log.sss("Script: "+script);
		 }*/
	}

	public void orderScripts() {
		if (_scripts.size() > 1) {
			//ScriptDocument npcInfo = null;

			for (int i = 0; i < _scripts.size();) {
				if (_scripts.get(i).getName().contains("NpcStatData")) {
					_scripts.addFirst(_scripts.remove(i));
					//scripts.set(i, scripts.get(0));
					//scripts.set(0, npcInfo);
				} else {
					i++;
				}
			}
		}
	}

	public void parsePackages() {
		L2ScriptEngineManager sem = L2ScriptEngineManager.getInstance();
		ScriptContext context = sem.getScriptContext("beanshell");
		try {
			sem.eval("beanshell", "double log1p(double d) { return Math.log1p(d); }");
			sem.eval("beanshell", "double pow(double d, double p) { return Math.pow(d,p); }");

			for (ScriptDocument script : _scripts) {
				parseScript(script, context);
			}
		} catch (Exception e) {
			e.printStackTrace();
		}
	}

	public void parseScript(ScriptDocument script, ScriptContext context) {
		if (_log.isDebugEnabled()) {
			_log.debug("Parsing Script: " + script.getName(), Config.SERVER_ID, "�ű�����");
		}

		Node node = script.getDocument().getFirstChild();
		String parserClass = "faenor.Faenor" + node.getNodeName() + "Parser";

		Parser parser = null;
		try {
			parser = createParser(parserClass);
		} catch (ParserNotCreatedException e) {
			_log.error("ERROR: No parser registered for Script: {" + parserClass + "}" , Config.SERVER_ID, e);
			e.printStackTrace();
		}

		if (parser == null) {
			_log.warn("Unknown Script Type: {" + script.getName() + "}", Config.SERVER_ID, "�ű�����");
			return;
		}

		try {
			parser.parseScript(node, context);
			_log.info("{" + script.getName() + "}Script Sucessfullty Parsed.", Config.SERVER_ID, "�ű�����");
		} catch (Exception e) {
			e.printStackTrace();
			_log.warn("Script Parsing Failed.", Config.SERVER_ID, e);
		}
	}

	@Override
	public String toString() {
		if (_scripts.isEmpty())
			return "No Packages Loaded.";

		String out = "Script Packages currently loaded:\n";

		for (ScriptDocument script : _scripts) {
			out += script;
		}
		return out;
	}

	@SuppressWarnings("synthetic-access")
	private static class SingletonHolder {
		protected static final FaenorScriptEngine _instance = new FaenorScriptEngine();
	}
}
